How Do You Offer Text Messaging Without SS7?

Thoughts on Carrier Evolution (Feb 1 2012)

1. It's just a thought, but since text messaging uses the Signaling System 7 out of band signaling channel, how does a service provider create and support text messaging once POTS and SS7 have been replaced? 

   Presumably that could be done, somehow, using similar techniques as instant messaging, at least up to a point. Whether it can be done in ways that still preserve current profit margins might be a bigger question.

   Or, does text messaging simply become a "discontinued" service? That seems unlikely, but has to be addressed, at some point. Also, if that is going to be done, why is text mesaging a service  that a mobile service provides? 

   Why couldn't it be a service that any ISP could create and deliver?

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